Marine Weather and TidesSanta Clara, CA

Version 3.4

What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:50AM

Sunset 4:55PM

Monday November 19, 2018 3:39 PM PST (23:39 UTC)

Moonrise 3:15PM

Moonset 2:56AM

Illumination 90%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

PZZ500 211 Pm Pst Mon Nov 19 2018 Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds into Tuesday. Increasing southerly winds arrive later Tuesday into Wednesday with the arrival of the first storm system in six weeks. Infrequent borderline gale force gusts may be possible with the frontal passage overnight through early Wednesday. Slight chance of Thunderstorms on Wednesday. Winds decrease Thursday. Mixed swell with a light northwest swell and a minor southerly swell. A longer northwest swell train arrives midweek.

Synopsis Dry, stagnant, hazy, and lingering smoke will
continue through Tuesday as high pressure gradually moves east. A
pattern change will develop by late Tuesday and widespread
rainfall is likely early Wednesday, with showers lingering
through Wednesday night and into Thursday morning. A second
system will likely bring additional rainfall to the area from
Thursday evening through Friday. Forecast models are trending
drier for next weekend.

Discussion As of 2:15 pm pst Monday... Upper level ridge axis
is slowly shifting east and extends northwestward into british
columbia. This is in response to an upper level low to our
southwest undercutting the ridge and a large trough in the north
pacific moving east. Upper low to our southwest has brought an
extensive cirrus deck to the region. Surface pattern remains
stagnant with generally light winds resulting in continued smoke
coverage over the bay area. Air quality remains in the unhealthy
category across the bay under these stagnant conditions.

Smoke haze will remain the main impact through the short term and
will persist tonight through Tuesday.

A series of storms are set to impact our region Wednesday through
the holiday weekend. Southerly to southeasterly flow will start
to increase on Tuesday ahead of an approaching trough. The increasing
southerly flow will help push some of the smoke haze out on
Tuesday, with additional improvement on Wednesday as southerly
flow further increases and rainfall helps to remove any lingering
smoke. Rainfall will begin late Tuesday night in the north bay
and will march south and east through the day on Wednesday. The
rain should arrive in time to impact the morning commute. Roadways
will likely be slick due to previous stretches of dry weather,
and motorists should use caution while driving. Rainfall amounts
will be heaviest in south to southwest-facing mountain areas, with
the big sur coast seeing the highest totals. Valley locations
downwind of mountain ranges, such as the salinas valley and santa
clara valley, will largely be rain shadowed until the cold front
passes Wednesday afternoon. Motorists traveling for thanksgiving
will also be impacted, with wet, slick roads around the region and
accumulating snow over the passes of the sierra nevada.

Showers look to continue Wednesday night into thanksgiving morning
before tapering off during the day as the trough moves overhead.

By late Thursday afternoon, the next storm will already be
beginning to impact the north bay. The euro trended a little further
south with the heaviest rain band with this system and as such
have increased rainfall amounts across the north bay. Points from

the bay area south will see less rainfall than the north bay with
this system than the trough on Wednesday as most of the moisture
moves inland to our north, with the southernmost zones only seeing
a few hundredths of an inch.

Showers will taper off by Saturday morning and a ridge will start
to build into the east pacific on Sunday and into Monday, bringing
a return to dry weather. Rain becomes possible again sometime next
week as the pattern remains progressive.

Aviation As of 10:00 am pst Monday... For 18z tafs. Upper low
off of southern california is spreading high clouds AOB 20000 ft
agl northward over the TAF sites this morning. Otherwise, main
impact continues to be smoke reducing visibility and limiting
slant range on approach throughout the sf bay area. Visibility
ranging in the ifr-MVFR range expected through the day at
ksfo koak klvk ksts ksjc kccr kapc but should begin to see some
improvements towards the 3-5sm range through the next 24 hours,
withVFR visibilities possible beginning tomorrow nite thru wed
arrival of first storm system in the area since oct 1-2.

Otherwise, light winds.

Vicinity of ksfo... Light winds, reduced vis to around 2sm-4sm and
periods of smoke and haze. Slant range issues through the morning. Passing
high clouds thru period. Visibility slowly improves into tomorrow,
then drastic improvement expected Tue nite through wed.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... High clouds and light winds. May see
reduced vis to MVFR due to wildfire smoke but generallyVFR
expected through the daylight hours.

Marine As of 02:12 am pst Monday... Generally light winds will
continue into Tuesday before southerly winds increase ahead of an
approaching front. Southerly winds will increase Tuesday night
into Wednesday with gale force gusts possible, especially along
the immediate coast from pigeon point to point piedras blancas.

There will also be a slight chance of thunderstorms across the
waters Wednesday morning through the evening. Winds will diminish
and gradually transition out of the northwest on thanksgiving.

Light mixed swell will continue through mid-week before a larger
northwest swell arrives late this week followed by another storm
system.

Mtr watches warnings advisories Tday None.

Public forecast: st
aviation: drp
marine: drp
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Weather Reporting Stations

EDIT(on/off) &nbspHelpNOTE: Click on distance to see the station location on a map

Weather Map and Satellite Images

(on/off) &nbspHelpWeather MapGOES Local Image of CentralWestCoastEDITNOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.Link to LoopOther links:
Northern PacificContential USFull GOES-East

Wind Forecast for San Francisco/Monterey Bay Area, CA (18,4,5,8)

Disclaimer:The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.